Why does flux flow through ferromagnetic materials?

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Can anyone help me understand why magnetic flux flows through ferromagnetic materials like an iron ring?

Also, say you have a toroid with a wire wrapped around it (in air) how can you say that the flux that goes through one "loop" will go through ALL the others?

These are just some things my book didn't do a very good job on explaining.
 

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By flux you mean how much of the field is going through the cross sectional area ?
Flux will flow through any conductor , like when i drop a strong permanent magnet down a copper pipe , it will reach a terminal velocity , because the field of the magnet starts current to flow in the pipe and creates its own B field that opposes the magnet.
If this is what you are talking about .
 

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